In article , Ant wrote:
I saw "Removed Full-screen video mirror controls from NVIDIA Control
Panel" in release 178 on page 8 in
http://us.download.nvidia.com/Window..._Release_Notes
.pdf
....
Currently, I am using 174.74_geforce_winxp_32bit_english_beta.exe which
works OK. I haven't upgraded my video card driver for a while. What was
the last driver release (beta or certified) before 178? No more NVIDIA
cards and driver after 178 for me.
Thank you in advance. 
Not sure , but its a fact that Microsoft required Nvidia to do this.